Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share (Tables) [Abstract]

Computations of basic and diluted earnings per share for Income from Continuing Operations

	For the				For the
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Net income	$	45.0	$	48.3	$	37.8	$	46.7
Add: Loss from discontinued operations		—		0.4		—		0.7
Income from continuing operations	$	45.0	$	48.7	$	37.8	$	47.4
Weighted-average shares outstanding — basic		53.2		55.1		53.4		55.6
Effect of diluted securities attributable to stock-based payments		1.1		1.2		1.1		1.2
Weighted-average shares outstanding — diluted		54.3		56.3		54.5		56.8
Earnings per share from continuing operations:
Basic	$	0.85	$	0.88	$	0.71	$	0.85
Diluted	$	0.83	$	0.86	$	0.69	$	0.83

Stock appreciation rights were outstanding but not included in diluted earnings per share calculation

	For the Six Months Ended June 30,
	2011		2010
Number of shares		464,314		546,289
Price ranges per share	$	46.78	$	$36.94